This study evaluates the effect of incorporating chemical agents with green polyethylene terephthalate (PET) bottles on extrudate color change and other properties. First, the best type of chemical agent that decolorizes recycled green PET bottles (RGPB) with good processability was determined. RGPB-chemical agent mixtures were evaluated, reducing, photoinitiator, or oxidant, where the best one turned out to be the oxidizing agent, a dicumyl peroxide. Then new mixtures of RGPB-oxidizing agent, dicumyl or benzoyl, were made in a reactive extrusion process employing a drying hopper to avoid hydrolytic degradation. The intrinsic viscosity, crystallinity, and color change of extrudates were determined. It was determined by SEM with EDS that the dye is possibly a chlorinated copper phthalocyanine. The final results show an increase in the intrinsic viscosity of the PET handling dicumyl peroxide, a partial whitening of the extrudates, and an increase in the crystallinity of the PET, which contributed to a decrease the hue and saturation of the green color of RGPB. Where the dicumyl peroxide present in mixtures with RGPB interacts with chlorinated copper phthalocyanine to produce phthalamide or phthalic acid, which are white.

这项研究评估了将化学试剂与绿色聚对苯二甲酸乙二醇酯（PET）瓶结合在一起对挤出物颜色变化和其他特性的影响。首先，确定了最佳类型的化学试剂，该化学试剂可对可回收的绿色PET瓶（RGPB）进行脱色并具有良好的可加工性。对RGPB-化学试剂混合物进行了评估，还原，光引发剂或氧化剂，其中最好的是氧化剂，一种过氧化二枯基。然后，在反应挤出过程中采用干燥料斗制备RGPB氧化剂，二枯基或苯甲酰基的新混合物，以避免水解降解。测定挤出物的特性粘度，结晶度和颜色变化。通过SEM用EDS确定该染料可能是氯化铜酞菁。最终结果显示，处理过氧化二枯基的PET的特性粘度增加，挤出物部分变白，PET的结晶度增加，这有助于降低RGPB的色相和绿色饱和度。与RGPB混合存在的过氧化二枯基与氯化铜酞菁相互作用生成白色的邻苯二甲酰胺或邻苯二甲酸。